834678221 has 8 divisors (see below), whose sum is σ = 899658144. Its totient is φ = 769808880.

The previous prime is 834678209. The next prime is 834678239. The reversal of 834678221 is 122876438.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 834678221 - 2⁶ = 834678157 is a prime.

It is a super-2 number, since 2×834678221² = 1393375465223449682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (834678281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11615 + ... + 42476.

It is an arithmetic number, because the mean of its divisors is an integer number (112457268).

Almost surely, 2^834678221 is an apocalyptic number.

It is an amenable number.

834678221 is a deficient number, since it is larger than the sum of its proper divisors (64979923).

834678221 is a wasteful number, since it uses less digits than its factorization.

834678221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55291.

The product of its digits is 129024, while the sum is 41.

The square root of 834678221 is about 28890.7982063494. The cubic root of 834678221 is about 941.5419918929.

The spelling of 834678221 in words is "eight hundred thirty-four million, six hundred seventy-eight thousand, two hundred twenty-one".